html,
body {
  background: transparent !important;

  /*
   When using iframe embedding, if you still need to keep the transparent background in dark mode
   you need to force the color-scheme to light

   使用 iframe 嵌入时，如果在暗色模式下仍需要保持透明背景，需要强制设定 color-scheme 为 light
   */
  color-scheme: light !important;
}
